forked from OSchip/llvm-project
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
//===-- hwasan_thread.h -----------------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of HWAddressSanitizer.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef HWASAN_THREAD_H
|
|
#define HWASAN_THREAD_H
|
|
|
|
#include "hwasan_allocator.h"
|
|
#include "sanitizer_common/sanitizer_common.h"
|
|
#include "sanitizer_common/sanitizer_ring_buffer.h"
|
|
|
|
namespace __hwasan {
|
|
|
|
typedef __sanitizer::CompactRingBuffer<uptr> StackAllocationsRingBuffer;
|
|
|
|
class Thread {
|
|
public:
|
|
// These are optional parameters that can be passed to Init.
|
|
struct InitState;
|
|
|
|
void Init(uptr stack_buffer_start, uptr stack_buffer_size,
|
|
const InitState *state = nullptr);
|
|
void InitRandomState();
|
|
void InitStackAndTls(const InitState *state = nullptr);
|
|
|
|
// Must be called from the thread itself.
|
|
void InitStackRingBuffer(uptr stack_buffer_start, uptr stack_buffer_size);
|
|
|
|
void Destroy();
|
|
|
|
uptr stack_top() { return stack_top_; }
|
|
uptr stack_bottom() { return stack_bottom_; }
|
|
uptr stack_size() { return stack_top() - stack_bottom(); }
|
|
uptr tls_begin() { return tls_begin_; }
|
|
uptr tls_end() { return tls_end_; }
|
|
bool IsMainThread() { return unique_id_ == 0; }
|
|
|
|
bool AddrIsInStack(uptr addr) {
|
|
return addr >= stack_bottom_ && addr < stack_top_;
|
|
}
|
|
|
|
AllocatorCache *allocator_cache() { return &allocator_cache_; }
|
|
HeapAllocationsRingBuffer *heap_allocations() { return heap_allocations_; }
|
|
StackAllocationsRingBuffer *stack_allocations() { return stack_allocations_; }
|
|
|
|
tag_t GenerateRandomTag(uptr num_bits = kTagBits);
|
|
|
|
void DisableTagging() { tagging_disabled_++; }
|
|
void EnableTagging() { tagging_disabled_--; }
|
|
|
|
u64 unique_id() const { return unique_id_; }
|
|
void Announce() {
|
|
if (announced_) return;
|
|
announced_ = true;
|
|
Print("Thread: ");
|
|
}
|
|
|
|
uptr &vfork_spill() { return vfork_spill_; }
|
|
|
|
private:
|
|
// NOTE: There is no Thread constructor. It is allocated
|
|
// via mmap() and *must* be valid in zero-initialized state.
|
|
void ClearShadowForThreadStackAndTLS();
|
|
void Print(const char *prefix);
|
|
uptr vfork_spill_;
|
|
uptr stack_top_;
|
|
uptr stack_bottom_;
|
|
uptr tls_begin_;
|
|
uptr tls_end_;
|
|
|
|
u32 random_state_;
|
|
u32 random_buffer_;
|
|
|
|
AllocatorCache allocator_cache_;
|
|
HeapAllocationsRingBuffer *heap_allocations_;
|
|
StackAllocationsRingBuffer *stack_allocations_;
|
|
|
|
u64 unique_id_; // counting from zero.
|
|
|
|
u32 tagging_disabled_; // if non-zero, malloc uses zero tag in this thread.
|
|
|
|
bool announced_;
|
|
|
|
friend struct ThreadListHead;
|
|
};
|
|
|
|
Thread *GetCurrentThread();
|
|
uptr *GetCurrentThreadLongPtr();
|
|
|
|
struct ScopedTaggingDisabler {
|
|
ScopedTaggingDisabler() { GetCurrentThread()->DisableTagging(); }
|
|
~ScopedTaggingDisabler() { GetCurrentThread()->EnableTagging(); }
|
|
};
|
|
|
|
} // namespace __hwasan
|
|
|
|
#endif // HWASAN_THREAD_H
|